 His books sold 140,000 copies between 1998 and 2011, at a value of over £2 million.Thirty thousand copies of "The Biggest Secret" (1999) were in print months after publication, according to Icke, and it was reprinted six times between 1999 and 2006.His 2002 book "Alice in Wonderland and the World Trade Center Disaster" became a long-standing top-five bestseller in South Africa.